tidb builtin_like_vec 源码
tidb builtin_like_vec 代码
文件路径：/expression/builtin_like_vec.go
// Copyright 2019 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expression
import (
"github.com/pingcap/tidb/util/chunk"
)
func (b *builtinLikeSig) vectorized() bool {
return true
}
func (b *builtinLikeSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
n := input.NumRows()
bufVal, err := b.bufAllocator.get()
if err != nil {
return err
}
defer b.bufAllocator.put(bufVal)
if err = b.args[0].VecEvalString(b.ctx, input, bufVal); err != nil {
return err
}
bufPattern, err := b.bufAllocator.get()
if err != nil {
return err
}
defer b.bufAllocator.put(bufPattern)
if err = b.args[1].VecEvalString(b.ctx, input, bufPattern); err != nil {
return err
}
bufEscape, err := b.bufAllocator.get()
if err != nil {
return err
}
defer b.bufAllocator.put(bufEscape)
if err = b.args[2].VecEvalInt(b.ctx, input, bufEscape); err != nil {
return err
}
escapes := bufEscape.Int64s()
// Must not use b.pattern to avoid data race
pattern := b.collator().Pattern()
result.ResizeInt64(n, false)
result.MergeNulls(bufVal, bufPattern, bufEscape)
i64s := result.Int64s()
for i := 0; i < n; i++ {
if result.IsNull(i) {
continue
}
pattern.Compile(bufPattern.GetString(i), byte(escapes[i]))
match := pattern.DoMatch(bufVal.GetString(i))
i64s[i] = boolToInt64(match)
}
return nil
}
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